THE EGS5 CODE SYSTEM

More documents

Recommendations

Info

uin=0.0 vin=0.0 win=1.0 ! Moving along z axis irin=2 ! Starts in region 2, could be 1 ! weight = 1 since no variance reduction used wtin=1.0 ! Weight = 1 since no variance reduction used !----------------------------------------------------------------------- ! Step 5: hatch-call !----------------------------------------------------------------------- ! Maximum total energy of an electron for this problem must be ! defined before hatch call emaxe = ein write(6,130) 130 format(/’ Start tutor1’/’ Call hatch to get cross-section data’) ! ------------------------------ ! Open files (before HATCH call) ! ------------------------------ open(UNIT=KMPI,FILE=’pgs5job.pegs5dat’,STATUS=’old’) open(UNIT=KMPO,FILE=’egs5job.dummy’,STATUS=’unknown’) write(6,140) 140 FORMAT(/,’ HATCH-call comes next’,/) ! ========== call hatch ! ========== ! ------------------------------ ! Close files (after HATCH call) ! ------------------------------ close(UNIT=KMPI) close(UNIT=KMPO) ! Pick up cross section data for ta write(6,150) ae(1)-RM, ap(1) 150 format(/’ Knock-on electrons can be created and any electron ’, *’followed down to’ /T40,F8.3,’ MeV kinetic energy’/ *’ Brem photons can be created and any photon followed down to’, */T40,F8.3,’ MeV’) ! Compton events can create electrons and photons below these cutoffs !----------------------------------------------------------------------- ! Step 6: Initialization-for-howfar !----------------------------------------------------------------------- zbound=0.1 144
! plate is 1 mm thick !----------------------------------------------------------------------- ! Step 7: Initialization-for-ausgab !----------------------------------------------------------------------- ! Print header for output - which is all ausgab does in this case write(6,160) 160 format(/T19,’Kinetic energy(MeV)’,T40,’charge’,T48, *’angle w.r.t. z axis-degrees’) !----------------------------------------------------------------------- ! Step 8: Shower-call !----------------------------------------------------------------------- ! Initiate the shower 10 times do i=1,10 write(6,170) i 170 format(’ Start history’,I4) call shower(iqin,ein,xin,yin,zin,uin,vin,win,irin,wtin) !----------------------------------------------------------------------- ! Step 9: Output-of-results !----------------------------------------------------------------------- ! Note output is at the end of each history in subroutine ausgab end do stop end !-------------------------last line of main code------------------------ !-------------------------------ausgab.f-------------------------------- !----------------------------------------------------------------------- !23456789|123456789|123456789|123456789|123456789|123456789|123456789|12 ! ---------------------------------------------------------------------- ! Required subroutine for use with the <strong>EGS5</strong> Code System ! ---------------------------------------------------------------------- !*********************************************************************** ! ! In general, ausgab is a routine which is called under a series ! of well defined conditions specified by the value of iarg (see the ! egs5 manual for the list). This is a particularly simple ausgab. ! Whenever this routine is called with iarg=3 , a particle has ! been discarded by the user in howfar ! we get ausgab to print the required information at that point ! !*********************************************************************** subroutine ausgab(iarg) implicit none include ’include/egs5_h.f’ include ’include/egs5_stack.f’ include ’include/egs5_useful.f’ ! Main EGS "header" file ! COMMONs required by <strong>EGS5</strong> code 145
Page 1 and 2:
THE EGS5 CODE SYSTEM 1 Hideo Hiraya
Page 3 and 4:
Contents 1 INTRODUCTION 1 1.1 Inten
Page 5 and 6:
2.15.6 Electron Step-Size Selection
Page 7 and 8:
B.4.9 Output of Results (Step 9) .
Page 9 and 10:
List of Figures 2.1 Program flow an
Page 11 and 12:
C.4 Subprogram relationships in PEG
Page 13 and 14:
B.5 Variable descriptions for COMMO
Page 15 and 16:
PREFACE In the nineteen years since
Page 17 and 18:
Chapter 1 INTRODUCTION 1.1 Intent o
Page 19 and 20:
“shower book”. For various reas
Page 21 and 22:
1.2.2 EGS1 About this time Nelson b
Page 23 and 24:
MSCAT. These versions of EGS, PEGS,
Page 25 and 26:
ten for energies less than 100 MeV
Page 27 and 28:
- Molière multiple scattering (i.e
Page 29 and 30:
EGS5. The primary advantages of thi
Page 31 and 32:
ICRU37-compliant using the NIST dat
Page 33 and 34:
high Z materials. Del Guerra et al.
Page 35 and 36:
One of these six cross sections is
Page 37 and 38:
at low energies. The latter, couple
Page 39 and 40:
If E 1 and E 2 are expressions invo
Page 41 and 42:
The result of this algorithm is tha
Page 43 and 44:
2.4 Particle Transport Simulation T
Page 45 and 46:
from appropriate distribution funct
Page 47 and 48:
parameters which may be needed. The
Page 49 and 50:
arrived at their values in a very m
Page 51 and 52:
Math FORTRAN Program Table 2.1 (con
Page 53 and 54:
Figure 2.2: Feynman diagrams for br
Page 55 and 56:
defined by δ ij = 1 if i = j, 0 ot
Page 57 and 58:
Davies, Bethe and Maximon[49] (e.g.
Page 59 and 60:
cross section given in Equation 2.4
Page 61 and 62:
and use this as the variable to be
Page 63 and 64:
we have Now define δ ′ = ∆ C
Page 65 and 66:
This agrees with formula (10) of Bu
Page 67 and 68:
That is, using Equations 2.122 and
Page 69 and 70:
d˘Σ P air, Run−time dE = [ 2 3
Page 71 and 72:
Angular distribution formulas The f
Page 73 and 74:
at either x = 0, x = (πE 0 ) 2 (i.
Page 75 and 76:
The following table, derived from t
Page 77 and 78:
Figure 2.3: Feynman diagrams for tw
Page 79 and 80:
where X 0 = radiation length (cm),
Page 81 and 82:
where α ′ 1 = α ′ 2 = k 0 ′
Page 83 and 84:
+ 1 E 2 ′ − 1 E 1 ′ − C 2 l
Page 85 and 86:
PEGS functions BHABDM, BHABRM, and
Page 87 and 88:
To find the limits of E, we first c
Page 89 and 90:
Figure 2.5: Feynman diagram for sin
Page 91 and 92:
Ī adj = average adjusted mean ioni
Page 93 and 94:
Table 2.2 (cont.) Z Symbol Atomic D
Page 95 and 96:
Table 2.3 (cont.) LABEL a m s x 0 x
Page 97 and 98:
(c) If 10.5 ≤ −C < 11.0 then x
Page 99 and 100:
obtain the real scattering angle. E
Page 101 and 102:
ρ = material mass density (g/cm 3
Page 103 and 104:
Hence, so that ln [1.13 + 3.76(αZ
Page 105 and 106:
g 3 (θ) = θ4 ( ) λf (0) (θ) + f
Page 107 and 108:
Actually, b = 0 does not correspond
Page 109 and 110: Assume that an electron starts off
Page 111 and 112: At small path lengths t, a very lar
Page 113 and 114: x Final Direction φ Θ ∆x t Init
Page 115 and 116: shown that this version of the rand
Page 117 and 118: and as we noted earlier, they are d
Page 119 and 120: Final Direction x Energy Hinges φ
Page 121 and 122: Transport Steps, ∆ E = E x ESTEPE
Page 123 and 124: tranport step 1 DEINITIAL1 DERESID1
Page 125 and 126: = ∆E ( ∣ ∣∣∣ dE −1 ∣
Page 127 and 128: Since the CSDA range is uniquely de
Page 129 and 130: short steps accurate, but slow step
Page 131 and 132: Table 2.4: Materials used in refere
Page 133 and 134: Average Lateral Displacement (cm) 0
Page 135 and 136: 100 MeV Electrons 0.01 0.001 Li C L
Page 137 and 138: actions involving photons with ener
Page 139 and 140: Cu 40 keV Counts (/keV/sr/source) 1
Page 141 and 142: Table 2.6: Data sources for general
Page 143 and 144: 2.16.2 Photoelectron Angular Distri
Page 145 and 146: where r 0 is the classical electron
Page 147 and 148: second term on the right-hand side
Page 149 and 150: Z θ k Y O φ e 0 X k 0 Figure 2.23
Page 151 and 152: Note the similarities and differenc
Page 153 and 154: X Z ω k 0 O e 0 Y Figure 2.25: Dir
Page 155 and 156: W = Atomic, molecular and mixture w
Page 157 and 158: In order to use EGS5 to answer the
Page 159: write(6,100) 100 FORMAT(’ PEGS5-c
Page 163 and 164: implicit none include ’include/eg
Page 165 and 166: 0.989 MeV kinetic energy Brem photo
Page 167 and 168: ! locally (in fact EDEP = particles
Page 169 and 170: inmax=max(binmax,ebin(j)) end do wr
Page 171 and 172: 0.40 0.0058 * 0.60 0.0054 * 0.80 0.
Page 173 and 174: !----------------------------------
Page 175 and 176: endif if(loop.lt.3) then write(6,12
Page 177 and 178: 180 FORMAT(/’ Knock-on electrons
Page 179 and 180: common/score/escore(3), iscore(3) r
Page 181 and 182: Brem photons can be created and any
Page 183 and 184: in any combination of 31 well speci
Page 185 and 186: end do end do ! nmed and dunit defa
Page 187 and 188: ! ------------------------------ cl
Page 189 and 190: if (iarg.eq.17) then ! A Compton sc
Page 191 and 192: ! the general purpose geometry subr
Page 193 and 194: eturn end !------------------------
Page 195 and 196: open(UNIT= 6,FILE=’egs5job.out’
Page 197 and 198: write(6,130) 130 format(/’ Start
Page 199 and 200: icol= * int(dlog10(ebin(j)*10000.0/
Page 201 and 202: 0.0300 0.0000* 0.0320 0.0001* 0.034
Page 203 and 204: 0.0780 0.0014 * 0.0800 0.0012 * 0.0
Page 205 and 206: The main purpose of this section, h
Page 207 and 208: 4.1.3 Leading Particle Biasing The
Page 209 and 210: • Sum the weighted energy deposit
Page 211 and 212:
4 z 6 Vac 11 5 Pb 6 5 Air 7 4 9 10
Page 213 and 214:
Figure 4.3: UCBEND simulation at 3.
Page 215 and 216:
necessary geometry input. The follo
Page 217 and 218:
Appendix A EGS5 FLOW DIAGRAMS Hideo
Page 219 and 220:
subroutine annih Version 051219-143
Page 221 and 222:
¡ eq 1 anormr = 1./sqrt(anorm2) si
Page 223 and 224:
1 br = max(br,0.D0) ekse2 = br*ekin
Page 225 and 226:
1 2 3 br = br*p esg = eie*br yes es
Page 227 and 228:
¤ ne ¤ ne subroutine collis (lele
Page 229 and 230:
¦ ne ¦ ne call ausgab(iarg) 6 iq(
Page 231 and 232:
subroutine compt Version 051219-143
Page 233 and 234:
3 4 5 6 icprof(medium) .eq. 3 no ye
Page 235 and 236:
subroutine counters_out Version 051
Page 237 and 238:
1 2 3 4 5 6 7 no ii .ne. jj yes no
Page 239 and 240:
© ne 1 2 3 neispl = (2*neispl + 1)
Page 241 and 242:
subroutine electr(ircode) ielectr =
Page 243 and 244:
7 8 9 10 11 12 13 detot = e(np)-ecu
Page 245 and 246:
2324 25 26 27 28 29 30 ustep .gt. d
Page 247 and 248:
4142 43 44 45 46 47 48 49 ecut(irne
Page 249 and 250:
5859 60 61 62 63 64 tmscat .eq. 0.0
Page 251 and 252:
73 74 75 76 no edep .lt. e(np) yes
Page 253 and 254:
subroutine hardx (charge,kEnergy,ke
Page 255 and 256:
1 2 3 4 5 iz = izz iz .eq. 0 no xsi
Page 257 and 258:
13 14 15 16 17 sint .ne. 0. yes rde
Page 259 and 260:
19 im=1 im=im+1 im >nmed no yes no
Page 261 and 262:
22 23 write(kmpo,1610) read(kmpi,12
Page 263 and 264:
26 27 28 iprofm(im) .ne. 1 no yes w
Page 265 and 266:
30 31 32 33 34 esig0(i,im) = esig0(
Page 267 and 268:
36 37 38 no iedgfl(ii).ne.0 .or. ia
Page 269 and 270:
no kaug .eq. 6 call lshell(3) kaug.
Page 271 and 272:
subroutine kxray Version 051219-143
Page 273 and 274:
1 2 3 dfl3aug(5,iz) .eq. 0. no naug
Page 275 and 276:
1 2 3 4 rnnow .le. omegal2(iz) + f2
Page 277 and 278:
1 2 dflx3(6,iz) .eq. 0. no nxray=nx
Page 279 and 280:
1 impacr(ir(np)).eq.1 .and. iedgfl(
Page 281 and 282:
1 2 fject = (ktot - k1grd(iprt,ik1)
Page 283 and 284:
5 6 7 8 9 thr = 1./eta "Central cor
Page 285 and 286:
1 2 3 delta = delcm(medium)*del "Re
Page 287 and 288:
8 9 10 11 12 galpha .ge. 0.0 yes no
Page 289 and 290:
subroutine photo Version 051219-143
Page 291 and 292:
4 5 6 7 8 rnnow .le. pbran(i) no ye
Page 293 and 294:
12 13 14 beta = sqrt((eelec - RM)*(
Page 295 and 296:
subroutine photon Version 051219-14
Page 297 and 298:
6 7 8 9 10 idisc .gt. 0 yes no edep
Page 299 and 300:
17 18 19 20 21 iausfl(iarg+1) ne 0
Page 301 and 302:
27 28 iausfl(iarg+1) ne 0 no ircod
Page 303 and 304:
subroutine rk1 Version 060313-0945
Page 305 and 306:
4 5 6 j=1 j=j+1 j>neke-1 no yes j .
Page 307 and 308:
18 19 20 21 22 23 elkeold = elke k1
Page 309 and 310:
1 2 "end of file; go to 13" read(17
Page 311 and 312:
4 5 "go to 30" no abs(k1mine-k1grd(
Page 313 and 314:
7 8 read(17,'(72a1)') buffer read(1
Page 315 and 316:
subroutine shower (iqi,ei,xi,yi,zi,
Page 317 and 318:
subroutine uphi(ientry,lvl) Version
Page 319 and 320:
subroutine randomset(rndum) Version
Page 321 and 322:
subroutine rluxinit Version 051219-
Page 323 and 324:
1 i=1 i=i+1 i>24 no yes seeds(i) =
Page 325 and 326:
subroutine rluxin Version 051219-14
Page 327 and 328:
Appendix B EGS5 USER MANUAL Hideo H
Page 329 and 330:
Table B.1: Variable descriptions fo
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Table B.12: Variable descriptions f
Page 339 and 340:
Optional parameter modifications Th
Page 341 and 342:
the call to PEGS5 may be skipped if
Page 343 and 344:
egions. Execution of EGS5 is termin
Page 345 and 346:
of the transport in the walls of el
Page 347 and 348:
call rluxinit after specifying LUXL
Page 349 and 350:
END OF FILE ON UNIT 12 PROGRAM STOP
Page 351 and 352:
do i=1,ncases uf(1)=ufi vf(1)=vfi w
Page 353 and 354:
crossed, then USTEP should be set t
Page 355 and 356:
subroutine howfar implicit none inc
Page 357 and 358:
Table B.18: IARG values program sta
Page 359 and 360:
As an example of how to write an AU
Page 361 and 362:
!**********************************
Page 363 and 364:
nreg=3 do i=2,nreg ecut(i)=100.0 pc
Page 365 and 366:
nlines=0 nwrite=15 !---------------
Page 367 and 368:
if (nlines.lt.nwrite) then write(6,
Page 369 and 370:
Appendix C PEGS USER MANUAL Hideo H
Page 371 and 372:
is entered. On each pass through th
Page 373 and 374:
(from previous figure) (to previous
Page 375 and 376:
(from previous figure) | | + ------
Page 377 and 378:
+------+ |BREMTR| +------+ | V +---
Page 379 and 380:
+------+ |PAIRTR| +------+ | V +---
Page 381 and 382:
Name DCSLOAD DCSSTOR DCSTAB ELASTIN
Page 383 and 384:
Name AFFACT AINTP ALKE ALKEI ALIN A
Page 385 and 386:
Table C.5: Functions in PEGS, part
Page 387 and 388:
+------+ +------+ +------+ +------+
Page 389 and 390:
Table C.8: ELEM option input data l
Page 391 and 392:
Table C.10: MIXT option input data
Page 393 and 394:
Table C.12: PWLF option input data
Page 395 and 396:
Table C.17: PLTN option input data
Page 397 and 398:
ICPROF is set to 3, the user must c
Page 399 and 400:
Column Line 12345678911234567892123
Page 401 and 402:
interiors of the intervals. If FEXA
Page 403 and 404:
C.3.6 The TEST Option The TEST opti
Page 405 and 406:
C.3.9 The HPLT Option The Histogram
Page 407 and 408:
Appendix D EGS5 INSTALLATION GUIDE
Page 409 and 410:
egs5 directory (preferably using th
Page 411 and 412:
6. The user is then asked to key-in
Page 413 and 414:
* User code tutor1.f has been compi
Page 415 and 416:
Appendix E CONTENTS OF THE EGS5 DIS
Page 417 and 418:
All of the actual FORTRAN source co
Page 419 and 420:
aprime.data Data for empirical brem
Page 421 and 422:
eryllium iron silicon bismuth krypt
Page 423 and 424:
The tutorial problems and advanced
Page 425 and 426:
Bibliography [1] R. G. Alsmiller Jr
Page 427 and 428:
[28] A. F. Bielajew. HOWFAR and HOW
Page 429 and 430:
[59] K. Flöttmann. Investigations
Page 431 and 432:
[92] H. Kolbenstvedt. Simple theory
Page 433 and 434:
[123] Y. Namito, H. Hirayama, A. Ta
Page 435 and 436:
[156] Y. A. Shreider, editor. The M
Page 437 and 438:
Index “shower book”, 37 AE, 28,
Page 439 and 440:
Klein-Nishina formula, 62 Landau di
show all

THE EGS5 CODE SYSTEM

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?